Gennady Golovkin/Photo by Associated Press

K2 Promotions on Friday announced standing-room only tickets for the Oct. 18 middleweight title fight between champion Gennady Golovkin and Marco Antonio Rubio at StubHub Center (on HBO) would go on sale immediately.

They are $27 and they can be purchased through the StubHub Center box office as well as by calling (888) 929-7849.

“The response to this event has been unprecedented for boxing at StubHub Center as (with) four weeks to go we’re virtually sold out of tickets,” said Tom Loeffler, managing director of K2 Promotions. “Therefore, we’re putting a limited number of standing-room only tickets on sale to meet demand.”